Donors

Donor density by zipcode using combined donors counts from Mar’25 and Aug’25 are mapped.

Diabetics

Percentage of diabetic, prediabetic, and normoglycemic donors by age-group are shown in this barplot.
For every age-group, a higher percentage of black and hispanic donors are diabetic than other races.

Gender

Boxplots for A1c% by age-group are compared between female and male donors.
Median values are labeled for each.
For each age-group, males have higher median value than females.

Race

Boxplots for A1c% by age-group are compared between asian, black, hispanic, and white donors.
Median values are labeled for each.
For each age-group, black donors have higher median value than others.

US estimates

US weighted estimates for diabetes and prediabetes, determined from NHANES 2021-2023 A1c lab data, is compared with the subset of Red Cross donor population.
For any age group, the percentage of diabetics or prediabetics is higher in the overall US estimated prevalence.

Clustering

Hierarchical clustering of the states using heat map simultaneously visualizes the percentage of diabetic donors within a state with the percentages of Black, Hispanic, and male donors. Data values are transformed to a color scale. States with higher percentage of diabetic donors have high percentage of black or hispanic or male donors

Zipcodes

Circles represent zipcodes
Zipcodes with high percentage of diabetic donors are colored purple, and with low percentage are green.
Click on a circle to see related information for the specific zipcode in the pop-up
Use mouse scroll button to zoom in or out

Summary